Motorcraft SP-479 Spark Plug 8-Pack — Complete Guide for Ford 5.4L 3-Valve Triton V8 Owners
If you own a 2004–2008 Ford F-150, F-250, Expedition, or Lincoln Navigator with the 5.4L 3-valve Triton V8 engine, replacing your spark plugs with the correct Motorcraft SP-479 is one of the most important maintenance jobs you can do. The 5.4L 3-valve engine has a well-known reputation for spark plug issues — and using the wrong plug, or waiting too long to replace them, can turn a simple service into an expensive repair. Here's everything you need to know.
What is the Motorcraft SP-479?
The Motorcraft SP-479 is the genuine OEM platinum spark plug for Ford's 5.4L 3-valve Triton V8 engine. It features platinum center and ground electrode tips for superior resistance to erosion, a tapered seat design, and a multi-rib insulator that prevents misfires. Pre-gapped to factory specifications, it delivers a service interval of 60,000 to 100,000 miles and comes backed by Motorcraft's 2-year / unlimited mile warranty.
⚠️ Important: The SP-479 is for the 5.4L 3-VALVE engine only. It does NOT fit the 5.4L 2-valve engine. Always verify your engine type before ordering.
Why does the correct spark plug matter so much on the 5.4L 3-valve?
The Ford 5.4L 3-valve Triton V8 has a unique two-piece spark plug design — the plug extends deep into the cylinder head. When plugs are left in too long, carbon buildup can cause them to seize, and removal can break the plug, leaving the tip stuck in the head. Using the correct Motorcraft SP-479 OEM plug and replacing on schedule is the best way to avoid this costly problem.
Correct OEM plug means correct heat range — prevents pre-ignition and fouling
Pre-gapped to factory specs — no adjustment needed
Replace on schedule (every 60,000–100,000 miles) to prevent suspended plugs
Always use anti-seize on the threads during installation
Key features
Platinum center and ground electrode tips — superior erosion resistance
Tapered seat design — no gasket needed
Multi-rib insulator — prevents misfire and false check engine lights
Pre-gapped to factory specifications
Service interval: 60,000–100,000 miles
Motorcraft 2-year / unlimited mile warranty
The only spark plug recommended by Ford for the 5.4L 3-valve Triton V8
Vehicle compatibility
- 2004–2008 Ford F-150 5.4L 3-valve Triton V8
- 2004–2008 Ford F-250 Super Duty 5.4L 3-valve V8
- 2004–2008 Ford F-350 Super Duty 5.4L 3-valve V8
- 2003–2008 Ford Expedition 5.4L 3-valve V8
- 2003–2008 Lincoln Navigator 5.4L 3-valve V8
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How to replace SP-479 spark plugs — tips for the 5.4L 3-valve
- Let the engine cool completely before starting — never remove plugs from a hot engine
- Disconnect the negative battery terminal
- Remove the ignition coil from the cylinder you're working on
- Use a 9/16" spark plug socket with extensions — the plugs are deep in the head
- Apply penetrating oil around each plug and wait 10 minutes before removal
- Remove slowly and carefully — if resistance is felt, stop and apply more penetrating oil
- Apply a thin coat of anti-seize to the new plug threads before installation
- Hand-tighten first, then torque to 26 ft-lbs — do NOT overtighten
- Reinstall ignition coil and repeat for all 8 cylinders
💡 Pro tip: Replace your ignition coils at the same time as your spark plugs. If your plugs need replacing, your DG-508 coils are likely due too — do both in one job and save yourself a second trip under the hood.🎥 Every order from SayParts includes a FREE step-by-step installation video covering the complete SP-479 8-plug replacement on your Ford 5.4L V8.Why buy from SayParts?
- 8 x Genuine Motorcraft SP-479 spark plugs with 2-year Ford warranty
- Free installation video with every order
- Free worldwide shipping
- Save vs AutoZone — $49.99 vs $56.00 for 8 plugs
Don't risk a seized spark plug from using the wrong part or waiting too long. The Motorcraft SP-479 8-pack is the correct OEM solution for your Ford 5.4L 3-valve Triton V8.
👉 Order the Motorcraft SP-479 8-Pack at SayParts: https://sayparts.com/products/motorcraft-sp-479-spark-plug-8-pack-ford-5-4l-v8-2004-2008
👉 Complete the tune-up — add the DG-508 Ignition Coil 8-Pack: https://sayparts.com/products/motorcraft-dg-508-ignition-coil-8-pack-ford-4-6l-5-4l-v8
Fits 2004–2008 Ford F-150, F-250, F-350, Expedition and 2003–2008 Lincoln Navigator with 5.4L 3-valve Triton V8 only. Not for 5.4L 2-valve engines. Verify fitment with your VIN before ordering.